I've got some problem on displaying objects. This occurs when the Reference (grey beam) display is on, otherwise everything is nice and clear in my own drawing. Both my project and the reference are .dgn.
Working area is around (in meter):X 414000Y 93000Z 0
GeForce GT 630 (latest driver is up)i5-34708Gb of RAM (listen to Daft Punk)
Thanks in advance!
You could try turning on the Clip Front/Back options in View Attributes (menu Settings > View Attributes).
See also the following article on Zig-Zag Edges in Shaded Views